Thanks to Mikael Pawlo[3], who writes, "The widely debated Craig Mundie speech is now online."
Mundie states among other things: "The OSS development model leads to a strong possibility of unhealthy 'forking' of a code base, resulting in the development of multiple incompatible versions of programs, weakened interoperability, product instability, and hindering businesses? ability to strategically plan for the future. Furthermore, it has inherent security risks and can force intellectual property into the public domain."
Read thespeech at Microsoft.com[4].